diff --git a/.travis.yml b/.travis.yml
index a70c711e..29a72d1c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,8 +19,6 @@ python:
 - pypy
 
 env:
-- MONGODB=2.6 PYMONGO=2.7
-- MONGODB=2.6 PYMONGO=2.8
 - MONGODB=2.6 PYMONGO=3.x
 
 matrix:
@@ -28,14 +26,10 @@ matrix:
   fast_finish: true
 
   include:
-  - python: 2.7
-    env: MONGODB=2.4 PYMONGO=2.7
   - python: 2.7
     env: MONGODB=2.4 PYMONGO=3.5
   - python: 2.7
     env: MONGODB=3.0 PYMONGO=3.x
-  - python: 3.5
-    env: MONGODB=2.4 PYMONGO=2.7
   - python: 3.5
     env: MONGODB=2.4 PYMONGO=3.5
   - python: 3.5
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 4dec42ce..47c9af9c 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -11,6 +11,7 @@ dev
 -  Update cached fields when fields argument is given #1712
 -  Add a db parameter to register_connection for compatibility with connect
 -  Use insert_one, insert_many in Document.insert #1491
+-  Use new update_one, update_many on document/queryset update #1491
 
 Changes in 0.15.0
 =================
diff --git a/mongoengine/context_managers.py b/mongoengine/context_managers.py
index c477575e..ec2e9e8b 100644
--- a/mongoengine/context_managers.py
+++ b/mongoengine/context_managers.py
@@ -1,9 +1,11 @@
+from contextlib import contextmanager
+from pymongo.write_concern import WriteConcern
 from mongoengine.common import _import_class
 from mongoengine.connection import DEFAULT_CONNECTION_NAME, get_db
 
 
 __all__ = ('switch_db', 'switch_collection', 'no_dereference',
-           'no_sub_classes', 'query_counter')
+           'no_sub_classes', 'query_counter', 'set_write_concern')
 
 
 class switch_db(object):
@@ -215,3 +217,10 @@ class query_counter(object):
         count = self.db.system.profile.find(ignore_query).count() - self.counter
         self.counter += 1
         return count
+
+
+@contextmanager
+def set_write_concern(collection, write_concerns):
+    combined_concerns = dict(collection.write_concern.document.items())
+    combined_concerns.update(write_concerns)
+    yield collection.with_options(write_concern=WriteConcern(**combined_concerns))
diff --git a/mongoengine/queryset/base.py b/mongoengine/queryset/base.py
index eec7df18..2f2d38dd 100644
--- a/mongoengine/queryset/base.py
+++ b/mongoengine/queryset/base.py
@@ -18,7 +18,7 @@ from mongoengine import signals
 from mongoengine.base import get_document
 from mongoengine.common import _import_class
 from mongoengine.connection import get_db
-from mongoengine.context_managers import switch_db
+from mongoengine.context_managers import set_write_concern, switch_db
 from mongoengine.errors import (InvalidQueryError, LookUpError,
                                 NotUniqueError, OperationError)
 from mongoengine.python_support import IS_PYMONGO_3
@@ -517,12 +517,15 @@ class BaseQuerySet(object):
             else:
                 update['$set'] = {'_cls': queryset._document._class_name}
         try:
-            result = queryset._collection.update(query, update, multi=multi,
-                                                 upsert=upsert, **write_concern)
+            with set_write_concern(queryset._collection, write_concern) as collection:
+                update_func = collection.update_one
+                if multi:
+                    update_func = collection.update_many
+                result = update_func(query, update, upsert=upsert)
             if full_result:
                 return result
-            elif result:
-                return result['n']
+            elif result.raw_result:
+                return result.raw_result['n']
         except pymongo.errors.DuplicateKeyError as err:
             raise NotUniqueError(u'Update failed (%s)' % six.text_type(err))
         except pymongo.errors.OperationFailure as err:
@@ -551,10 +554,10 @@ class BaseQuerySet(object):
                                     write_concern=write_concern,
                                     full_result=True, **update)
 
-        if atomic_update['updatedExisting']:
+        if atomic_update.raw_result['updatedExisting']:
             document = self.get()
         else:
-            document = self._document.objects.with_id(atomic_update['upserted'])
+            document = self._document.objects.with_id(atomic_update.upserted_id)
         return document
 
     def update_one(self, upsert=False, write_concern=None, **update):
diff --git a/tests/queryset/queryset.py b/tests/queryset/queryset.py
index 4f940520..5c3f179f 100644
--- a/tests/queryset/queryset.py
+++ b/tests/queryset/queryset.py
@@ -9,6 +9,7 @@ from nose.plugins.skip import SkipTest
 import pymongo
 from pymongo.errors import ConfigurationError
 from pymongo.read_preferences import ReadPreference
+from pymongo.results import UpdateResult
 import six
 
 from mongoengine import *
@@ -670,14 +671,14 @@ class QuerySetTest(unittest.TestCase):
 
         result = self.Person(name="Bob", age=25).update(
             upsert=True, full_result=True)
-        self.assertTrue(isinstance(result, dict))
-        self.assertTrue("upserted" in result)
-        self.assertFalse(result["updatedExisting"])
+        self.assertTrue(isinstance(result, UpdateResult))
+        self.assertTrue("upserted" in result.raw_result)
+        self.assertFalse(result.raw_result["updatedExisting"])
 
         bob = self.Person.objects.first()
         result = bob.update(set__age=30, full_result=True)
-        self.assertTrue(isinstance(result, dict))
-        self.assertTrue(result["updatedExisting"])
+        self.assertTrue(isinstance(result, UpdateResult))
+        self.assertTrue(result.raw_result["updatedExisting"])
 
         self.Person(name="Bob", age=20).save()
         result = self.Person.objects(name="Bob").update(
diff --git a/tox.ini b/tox.ini
index 9bb0c5ec..2f2b1757 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,13 +1,11 @@
 [tox]
-envlist = {py27,py35,pypy,pypy3}-{mg27,mg28,mg35,mg3x}
+envlist = {py27,py35,pypy,pypy3}-{mg35,mg3x}
 
 [testenv]
 commands =
     python setup.py nosetests {posargs}
 deps =
     nose
-    mg27: PyMongo<2.8
-    mg28: PyMongo>=2.8,<2.9
     mg35: PyMongo==3.5
     mg3x: PyMongo>=3.0
 setenv =